I only had the roughest idea. Had David stayed for one final year, it would certainly have been his last, so my pitch was that it would start with the TARDIS crashing in Amelia's back garden - as now - and a terribly battered and bruised Tenth Doctor staggering out. Amelia finds him, feeds him fish custard (no that was for Matt, it would have been something more Davidy) and generally helps him. But we, the audience, can see he's in a truly bad way. Dying maybe. Eventually he heads back to his TARDIS, and flies off.
But when he returns - many years later for Amy - he seems perfectly fine, and indeed doesn't remember any of those events...And of course over time, we realise what we saw was the Tenth Doctor at the end of his life, about to regenerate.
Events that we return to in Episode 13...

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Interestingly Moffat's version of things where the doctor is nearing his end(Big Bang or proposed season 5) all involve seeing Amelia.

I wonder if he'll do the same when Smith steps down.

We get a glimpse of Caitlin(little Amy) who's a few years older the last time we saw her

RTD wasn't anywhere close to writing "The End of Time" when Tennant turned down Moffat's offer for series 5. They were filming the River Song two-parter at the time, so while RTD knew there was going to be a year of specials, he had no idea what those specials were going to be.

If Tennant had wibbled and decided to stay on for series 5, if there was an "End of Time," it would have been vastly different -- and RTD would likely have written his final special as a lead-in to whatever Moffat had in mind.

RTD wasn't anywhere close to writing "The End of Time" when Tennant turned down Moffat's offer for series 5. They were filming the River Song two-parter at the time, so while RTD knew there was going to be a year of specials, he had no idea what those specials were going to be.

If Tennant had wibbled and decided to stay on for series 5, if there was an "End of Time," it would have been vastly different -- and RTD would likely have written his final special as a lead-in to whatever Moffat had in mind.

Click to expand...

I have a feeling that if Tennant did stay on, I probably wouldn't have liked his last series anywhere near as much as his previous ones. I don't really like Moffatt's style of writing much. To many plot twists.

I've always imagined had series five featured Tennant it could have played out pretty much as it did, but the twist could have been as Amy 'wishes' the Doctor back into existence and the Tardis materializes at her reception, when the doors open instead of Dr 10 emrging it could be Dr 11. The regeneration could have happened off screen and then series 6 could have had a running story arc where doubts are created in both Amy and Rory (and more importantly the audiences' minds) as to whether or not this is indeed the Doctor, or a substitute.

RTD wasn't anywhere close to writing "The End of Time" when Tennant turned down Moffat's offer for series 5. They were filming the River Song two-parter at the time, so while RTD knew there was going to be a year of specials, he had no idea what those specials were going to be.

If Tennant had wibbled and decided to stay on for series 5, if there was an "End of Time," it would have been vastly different -- and RTD would likely have written his final special as a lead-in to whatever Moffat had in mind.

Click to expand...

Well, he wouldn't have needed to do any lead in on the basis of what's been posted here: the last of the 2009 specials could have ended with the Doctor heading off as normal: then 11th Hour opens with the dying Doctor crashing in Amelia's garden, without any explanation at the time, but we later learn that's the Doctor from season's end. Then the Doctor, just post-2009 specials, turns up as normal and meets Amy with no knowledge of young Amelia's meeting with his later self.

RTD wasn't anywhere close to writing "The End of Time" when Tennant turned down Moffat's offer for series 5. They were filming the River Song two-parter at the time, so while RTD knew there was going to be a year of specials, he had no idea what those specials were going to be.

If Tennant had wibbled and decided to stay on for series 5, if there was an "End of Time," it would have been vastly different -- and RTD would likely have written his final special as a lead-in to whatever Moffat had in mind.

Click to expand...

Well, he wouldn't have needed to do any lead in on the basis of what's been posted here: the last of the 2009 specials could have ended with the Doctor heading off as normal: then 11th Hour opens with the dying Doctor crashing in Amelia's garden, without any explanation at the time, but we later learn that's the Doctor from season's end. Then the Doctor, just post-2009 specials, turns up as normal and meets Amy with no knowledge of young Amelia's meeting with his later self.

No need for any set up from RTD.

Click to expand...

Some minor tweaking from "Planet of the Dead" and we're good

-Take out the psychic black woman giving the doctor a warning

"Planet of the Dead" basically ends the same way with Christina off in the bus and the Doctor going back inside the TARDIS

The Christmas special would be "The Eleventh Hour" since Amelia is praying for Christmas presents and Santa

I only had the roughest idea. Had David stayed for one final year, it would certainly have been his last, so my pitch was that it would start with the TARDIS crashing in Amelia's back garden - as now - and a terribly battered and bruised Tenth Doctor staggering out. Amelia finds him, feeds him fish custard (no that was for Matt, it would have been something more Davidy) and generally helps him. But we, the audience, can see he's in a truly bad way. Dying maybe. Eventually he heads back to his TARDIS, and flies off.
But when he returns - many years later for Amy - he seems perfectly fine, and indeed doesn't remember any of those events...And of course over time, we realise what we saw was the Tenth Doctor at the end of his life, about to regenerate.
Events that we return to in Episode 13...

Click to expand...

Interestingly Moffat's version of things where the doctor is nearing his end(Big Bang or proposed season 5) all involve seeing Amelia.

I wonder if he'll do the same when Smith steps down.

We get a glimpse of Caitlin(little Amy) who's a few years older the last time we saw her

Click to expand...

Well that would have been a nice idea, hopefully he won't do that with Smith given he's already given the game away now though

As interesting as I think that would have been, if Tennant had stayed on, it means that we wouldn't have gotten Season 5's best episode, "The Lodger." Let's face it, so much of that episode is based on Smith's social awkwardness. Tennant is just too cool for it to work.

As interesting as I think that would have been, if Tennant had stayed on, it means that we wouldn't have gotten Season 5's best episode, "The Lodger." Let's face it, so much of that episode is based on Smith's social awkwardness. Tennant is just too cool for it to work.

Click to expand...

Except that... The Lodger is adapted from a DWM comic strip of the same name, with the 10th Doctor and Mickey rather than 11 and Craig.